in the presidential race had surpassed $600 million: $318.5 million for team romney, $287.2 million for team obama. and get this: more than half of all that money for ads has been sent in just three swing states, florida, ohio and virginia. what's more, huge sums, not only for ads but for get-out-the-vote efforts like mailings and robocalls are going into house and senate races in the fight to control congress. altogether, three billion dollars in campaign cash have been raised so far, and a projected $6 billion by the election, less than seven weeks away. it's not just that we're being hit by swarms of ads thicker than locusts. what's truly frightening is that we don't know who's really paying for them. president barack obama: i'm pledging to cut the deficit -- >>> romney's worth $200 million. >>> the president's doing a mediocre job. >>> governor romney cares about big business. >>> real job growth cut the debt. >>> i had no healthcare. >>> -- to the highest corporate bidders -- >>> if you're a super pac, empowered by the supreme court's citizens united decision to take unlimited donations, you'